/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsp.core.internal.java;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IProblemRequestor;
import org.eclipse.jdt.core.WorkingCopyOwner;
/**
* To ensure there is only one instance of ProblemRequestor and WorkingCopyOwner
* for JSP plugins. These were removed from JSPTranslation to ensure that the
* JSPTranslation was not held in memory by any type of JDT lists (caching
* search results, etc...)
*
* @author pavery
*/
public class CompilationUnitHelper {
private JSPProblemRequestor fProblemRequestor = null;
private WorkingCopyOwner fWorkingCopyOwner = null;
private static CompilationUnitHelper instance;
private CompilationUnitHelper() {
// force use of instance
}
public synchronized static final CompilationUnitHelper getInstance() {
if (instance == null)
instance = new CompilationUnitHelper();
return instance;
}
public JSPProblemRequestor getProblemRequestor() {
if (fProblemRequestor == null)
fProblemRequestor = new JSPProblemRequestor();
return fProblemRequestor;
}
public WorkingCopyOwner getWorkingCopyOwner() {
if (fWorkingCopyOwner == null) {
fWorkingCopyOwner = new WorkingCopyOwner() {
/* (non-Javadoc)
* @see org.eclipse.jdt.core.WorkingCopyOwner#getProblemRequestor(org.eclipse.jdt.core.ICompilationUnit)
*/
public IProblemRequestor getProblemRequestor(ICompilationUnit workingCopy) {
return CompilationUnitHelper.this.getProblemRequestor();
}
public String toString() {
return "JSP Working copy owner"; //$NON-NLS-1$
}
};
}
return fWorkingCopyOwner;
}
}